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| Max-Planck Forschungsberichte (laufend) |
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Forschungsbericht 200826-3
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Aus den Highlights 26/2008:
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Very-high-energy gamma rays from a distant quasar: How transparent is the universe?
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The atmospheric Cherenkov gamma- ray telescope MAGIC, designed for a low- energy threshold, has detected very- high- energy gamma rays from a giant flare of the distant Quasi- Stellar Radio Source ( in short: radio quasar) 3C 279, at a distance of more than 5 billion light- years ( a redshift of 0.536). No quasar has been observed previously in very- high- energy gamma radiation, and this is also the most distant object detected emitting gamma rays above 50 gigaelectron volts. Because high- energy gamma rays may be stopped by interacting with the diffuse background light in the universe, the observations by MAGIC imply a low amount for such light, consistent with that known from galaxy counts.
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Autoren
Albert J. Aliu E. Anderhub H. Antonelli LA. Antoranz P. Backes M. Baixeras C. Barrio JA. Bartko H. Bastieri D. Becker JK. Bednarek W. Berger K. Bernardini E. Bigongiari C. Biland A. Bock RK. Bonnoli G. Bordas P. Bosch-Ramon V. Bretz T. B
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Titel
Very-high-energy gamma rays from a distant quasar: How transparent is the universe?
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Quelle
Science. 320(5884):1752-1754, 2008 Jun 27.
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ISSN
0036-8075
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KeyWords Plus
Extragalactic background light, Telescope, Radiation, 3c-279, Counts.
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Forschungsgebiet
Astronomie/Astrophysik
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Art der Ver�fentlichung
Article
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Institution
Bock RK Max Planck Inst Phys & Astrophys D-80805 Munich Germany Max Planck Inst Phys & Astrophys D-80805 Munich Germany Univ Wurzburg D-97074 Wurzburg Germany Univ Autonoma Barcelona, Inst Fis Altes Energies E-08193 Barcelona Spain ETH CH-8093 Zurich Switzerland Natl Inst Astrophys, INAF I-00136 Rome Italy Univ Complutense E-28040 Madrid Spain Tech Univ Dortmund D-44221 Dortmund Germany Univ Autonoma Barcelona E-08193 Barcelona Spain Max Planck Inst Phys & Astrophys D-80805 Munich Germany Univ Padua I-35131 Padua Italy Ist Nazl Fis Nucl I-35131 Padua Italy Univ Lodz PL-90236 Lodz Poland DESY D-15738 Zeuthen Germany Univ Siena I-53100 Siena Italy Ist Nazl Fis Nucl I-53100 Siena Italy Univ Barcelona, Inst Ciencias Cosmos IEEC E-08028 Barcelona Spain Yerevan Phys Inst AM-375036 Yerevan Armenia Inst Astrofis Canarias E-38200 San Cristobal la Laguna Spain Univ La Laguna, Dept Astrofis E-38206 Tenerife Spain Univ Udine I-33100 Udine Italy INFN Trieste I-33100 Udine Italy CSIC, IEEC E-80193 Bellaterra Spain CSIC, Inst Astrofis Andalucia E-18080 Granada Spain Univ Calif Davis Davis, CA 95616 USA et al
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ISI Accession Number
2008-318VP-0005
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